Cardiac monitor



FIG. 1 is a front view of a cardiac monitor showing my new design.

FIG. 2 is a back view according to FIG. 1.

FIG. 3 is a top view according to FIG. 1.

FIG. 4 is a bottom view according to FIG. 1.

FIG. 5 is a left view according to FIG. 1; and,

FIG. 6 is a right view according to FIG. 1.

The broken lines in FIG. 1 represent an environmental subject matter andform no part of the claimed design.

CLAIM The ornamental design for a cardiac monitor, as shown anddescribed.